//SPI_MODE_0 (0,0) CPOL = 0, CPHA = 0, Clock idle low, data is clocked in on rising edge, output data (change) on falling edge
//SPI_MODE_1 (0,1) CPOL = 0, CPHA = 1, Clock idle low, data is clocked in on falling edge, output data (change) on rising edge
//SPI_MODE_2 (1,0) CPOL = 1, CPHA = 0, Clock idle high, data is clocked in on falling edge, output data (change) on rising edge
//SPI_MODE_3 (1,1) CPOL = 1, CPHA = 1, Clock idle high, data is clocked in on rising, edge output data (change) on falling edge
//SpiChnOpen flags:
// SPI_OPEN_CKP_HIGH = set the clock polarity to (idle-high, active-low). Otherwise is (idle-low, active-high).
// SPI_OPEN_CKE_REV = set the Clock Edge reversed: transmit from active to idle. Otherwise transmit when clock goes from idle to active
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